This district leans Republican. Ken Calvert, a Republican, has taken $1,080,341, and Young Kim, a Republican, has taken $589,620 — both linked to AIPAC, the pro-Israel lobbying group.
Major issues facing California, based on 2025–2026 reporting. Compare them with what each candidate says they focus on below.
FEC campaign finance data through Sep 30, 2026. Campaign dollars, by source.
| Young Kim R | Ken Calvert R | |
|---|---|---|
| Raised | $10M | $6.8M |
| Individuals | $6.4M64% | $2.9M43% |
| PACs & parties | $1.8M18% | $1.6M23% |
| Self-funded | $0 | $0 |
| Other | $1.8M19% | $2.3M34% |
| AIPAC-linked* | $590K | $1.1M |
| Outside spending† | — | — |
* AIPAC-linked money is already counted in the rows above — it flags the pro-Israel share, not extra money.
† Independent spending on ads for or against a candidate. It never goes to their campaign.
“Individuals” covers both small-dollar (under $200) and large donors.
Every donor ranked by how much they gave, from the candidate’s own FEC filings — individuals, PACs, and party committees all in one list. Expand a candidate to see theirs, then tap any name to learn more about the donor.
Why are so many gifts exactly $10,000? That’s the legal maximum a PAC can give one candidate for the whole cycle — $5,000 for the primary plus $5,000 for the general — so many PACs give the max. Individuals can give up to $3,500 per election.
Showing the 50 biggest of 5749 donors. The other 5699 gave $4.7M combined.
Plus $1.9M from small donors giving under $200 each — those aren’t itemized by name.
Showing the 50 biggest of 1499 donors. The other 1449 gave $3.1M combined.
Plus $310K from small donors giving under $200 each — those aren’t itemized by name.
These figures come from the candidate’s own itemized FEC reports (2026 cycle, through the coverage date above), with amendments applied and refunds netted. Joint fundraising transfers are left out of the ranking: they’re pass-throughs, and the individual donations behind them are listed above. Bank interest, vendor refunds, and other non-donation receipts are excluded. Donor names are as reported — the same person can appear twice if their name was recorded differently. Independent spending on ads is never included here — see the Outside spending column.
October 20, 2026
Defense-tech money floods rare Republican-vs-Republican House race: $6.3M super PAC hits Young Kim, backs Ken Calvert in CA-40
Americans 4 Security PAC, a Wisconsin super PAC whose biggest disclosed funders include Palantir's CEO Alex Karp ($525,000) and CTO Shyam Sankar ($250,000) plus $2.1 million from its own dark-money 501(c)(4), has now spent $6.3 million this cycle — $5.6 million opposing Rep. Young Kim and $252,000 supporting Rep. Ken Calvert in California's 40th, where redistricting threw the two Republican incumbents into the same district. The PAC added another $300,000 in anti-Kim media on Oct 20. It is under a CREW FEC/IRS complaint alleging its nonprofit arm hides its donors; see the full picture in the spoiler playbook.
Source: FEC filings; CREW →